Monkey-wrench.



nmronn A. THOMAS, or san rnancrsco, CALIFORNIA.

MONKEY-WRENCH.

,Speeiilcationfot Letters latent. Patented Nov, 28, 1911,

Application tiled September 13, 1910. Serial No. 581,778.

To alljwhevm 'it may con/cern: l

Be 1t known that I, BRADFORD A. THOMAS,

. a. citizen of the United States, residing at San Francisco, in thecounty of San Francisco and State of California, have invented certainnew and useful Improvements in Monkey-Wrenches, of which the followingis a specification, reference being had thereinto the accompanyingdrawing.

proved wrench by means of which a movable fixed jaw may be ri idlytightened in place after it has been a justed to clamped position.

, The invention further has for its object to provide a new ,andimproved wrench by means of which the adjusted part is securely lockedinposition.

Referring to the accom anying drawings z--Figure 1 is a view o a wrenchwith parts broken away and in section, constructed in accordancewith-this invention. Fig. 2 is-a transverse sectional view thereof onthe line w-w of Fig. 1. Fig. 3 is a transverse sectional view showing.the change of position of the screw stem. Fig.

4 is a cross section on the line y--y of Fig. Y,

1. Fig. 5 is a detail view of the connections of a portion of theoperating mechanism. (1). indicates a fixed jaw of the wrench mounted onthe end of a bar or shank 2 provided with a handle 3.

(4 indicates the removable jaw which is slida ly mounted on the shank 2and which is formed with -a tubular projection 5 parallel with the shank2 and connected therewith by means of a sleeve or strap 6.v Two sides ofthe socket of the tubular projection 4out of engagement with thesections of thread 7 the tubular projection 5 may be slid lengthwise onthe stem 9. When the stem' is turned to the position shown in Fig. 3 itis locked in engagement with the tubu. lar .projection 5 and holds thejaw 4 in adjusted position. The rear end'of the stem 9 is provided witha thumb nut 11, said thumb nut being mounted eccentrically on the end ofthe stem 9 and being locked in a keeper 12 projecting over the shank 2.The

thumb nut 11 is provided with a projection This lnvention relates towrenches, andhas for its objectto provide a new and 1m- 12 having a head13 which is connected to oneend of a threaded shank or stem 14. and isinclosed ina socket 15 in the end of the threaded shank 14,-said partsbeing connected together as shown by the Haring end of the threadedshank 1'4 which is clamped over the head 13 of a stem 12. The stem 14has its bearing in a projection 16 of the 11 and advancing the stem 9against the inner end of the tubular socket 5 thereb bearing'against theobject being clampe After the jaw 4 is in clamping'position, by turningthe thumb nut 11 the threads or teeth 8 of the stem 9 will be moved intoengagement with the section 7 and the tubular projection 5, and at thesame time willbe locked in place by the thumb nut 11 binding in thekeeper 12 owing to its eccentric position on the steml 9. l

Having described the invention, I claim A wrench of thecharacterdescribed comprising a Vshank having a handle secured thereto,a fixed jaw on said shank, a movable jaw also on said shank and beingprovided keeper, 'a projection extending rearwardly end of theprojection carried by said eccenfrom said thumb nut and being providedtric thumb nut. 10 with an enlarged end, a pair of projections Intestimony whereof I hereunto ax my on said handle, and a threaded stemprosignature in presence of two Witnesses.

5 vided with a thumb nut at one end mounted BRADFORD A. THMAS.

between said projections, said stem being Witnesses: provided at theother end with a socket F. R. MARSH,

adapted for engagement with the enlarged WM. HASSHAGHEN.

